Influence of Molding Technology on Thermal Efficiencies and Pollutant Emissions from Household Solid Fuel Combustion during Cooking Activities in Chinese Rural Areas

Resident combustion of solid fuel has been widely acknowledged as a high potential for pollutant reduction. However, there is a marked asymmetry between more pollutant emission and less burned volatiles of biomass and coal in the combustion process. To study the solid fuel optimum combustion form in...

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Autores principales:	Juan Qi, Jianjun Wu, Lei Zhang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	thermal efficiencies pollutant emissions molding solid fuel household combustion Mathematics QA1-939
Acceso en línea:	https://doaj.org/article/f5f09611e7cb420598921fd0d1f19351
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spelling	oai:doaj.org-article:f5f09611e7cb420598921fd0d1f193512021-11-25T19:07:44ZInfluence of Molding Technology on Thermal Efficiencies and Pollutant Emissions from Household Solid Fuel Combustion during Cooking Activities in Chinese Rural Areas10.3390/sym131122232073-8994https://doaj.org/article/f5f09611e7cb420598921fd0d1f193512021-11-01T00:00:00Zhttps://www.mdpi.com/2073-8994/13/11/2223https://doaj.org/toc/2073-8994Resident combustion of solid fuel has been widely acknowledged as a high potential for pollutant reduction. However, there is a marked asymmetry between more pollutant emission and less burned volatiles of biomass and coal in the combustion process. To study the solid fuel optimum combustion form in a household stove, both the pollution reduction and energy efficient utilization of crop straws and coals were investigated. Taking the molding pressure and clay addition ratio as variable process conditions, the research of bio-coal briquette (made from the mixture of anthracite and biomass) was implemented in the range of 15~35 MP and 5~15%, respectively. Biomass and coal work complementarily for each other’s combustion property development. In particular, the pyrolysis gas produced by biomass low-temperature devolatilization is featured with low ignition point and is distributed in the bio-coal briquette. Its own combustion provides energy for anthracite particle combustion. Consequently, a positive effect was identified when bio-coal briquettes were used as residential fuel, and further improvement manifested in reducing more than 90% of particle matter (PM) and achieving about twice the thermal efficiencies (TEs) compared with the mass-weighted average values of coal briquettes and biomass briquettes. 88.8 ± 11.8%, 136.7 ± 13.7% and 81.4 ± 17.7% more TEs were provided by wheat straw–coal briquettes, rice straw–coal briquettes and maize straw–coal briquettes. 93.3 ± 3.1% (wheat straw–coal), 97.6 ± 0.2% (rice straw–coal) and 90.4 ± 2.2% (maize straw–coal) in terms of PM<sub>2.5</sub> emission factors (EFs) was reduced. For bio-coal briquette, a 25 MPa and 10% addition were determined as the optimum molding pressure and clay addition ratio. Bio-coal briquettes with higher TEs and lower PM EFs will bring about substantial benefits for air quality promotion, human health and energy saving.Juan QiJianjun WuLei ZhangMDPI AGarticlethermal efficienciespollutant emissionsmoldingsolid fuelhousehold combustionMathematicsQA1-939ENSymmetry, Vol 13, Iss 2223, p 2223 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	thermal efficiencies pollutant emissions molding solid fuel household combustion Mathematics QA1-939
spellingShingle	thermal efficiencies pollutant emissions molding solid fuel household combustion Mathematics QA1-939 Juan Qi Jianjun Wu Lei Zhang Influence of Molding Technology on Thermal Efficiencies and Pollutant Emissions from Household Solid Fuel Combustion during Cooking Activities in Chinese Rural Areas
description	Resident combustion of solid fuel has been widely acknowledged as a high potential for pollutant reduction. However, there is a marked asymmetry between more pollutant emission and less burned volatiles of biomass and coal in the combustion process. To study the solid fuel optimum combustion form in a household stove, both the pollution reduction and energy efficient utilization of crop straws and coals were investigated. Taking the molding pressure and clay addition ratio as variable process conditions, the research of bio-coal briquette (made from the mixture of anthracite and biomass) was implemented in the range of 15~35 MP and 5~15%, respectively. Biomass and coal work complementarily for each other’s combustion property development. In particular, the pyrolysis gas produced by biomass low-temperature devolatilization is featured with low ignition point and is distributed in the bio-coal briquette. Its own combustion provides energy for anthracite particle combustion. Consequently, a positive effect was identified when bio-coal briquettes were used as residential fuel, and further improvement manifested in reducing more than 90% of particle matter (PM) and achieving about twice the thermal efficiencies (TEs) compared with the mass-weighted average values of coal briquettes and biomass briquettes. 88.8 ± 11.8%, 136.7 ± 13.7% and 81.4 ± 17.7% more TEs were provided by wheat straw–coal briquettes, rice straw–coal briquettes and maize straw–coal briquettes. 93.3 ± 3.1% (wheat straw–coal), 97.6 ± 0.2% (rice straw–coal) and 90.4 ± 2.2% (maize straw–coal) in terms of PM<sub>2.5</sub> emission factors (EFs) was reduced. For bio-coal briquette, a 25 MPa and 10% addition were determined as the optimum molding pressure and clay addition ratio. Bio-coal briquettes with higher TEs and lower PM EFs will bring about substantial benefits for air quality promotion, human health and energy saving.
format	article
author	Juan Qi Jianjun Wu Lei Zhang
author_facet	Juan Qi Jianjun Wu Lei Zhang
author_sort	Juan Qi
title	Influence of Molding Technology on Thermal Efficiencies and Pollutant Emissions from Household Solid Fuel Combustion during Cooking Activities in Chinese Rural Areas
title_short	Influence of Molding Technology on Thermal Efficiencies and Pollutant Emissions from Household Solid Fuel Combustion during Cooking Activities in Chinese Rural Areas
title_full	Influence of Molding Technology on Thermal Efficiencies and Pollutant Emissions from Household Solid Fuel Combustion during Cooking Activities in Chinese Rural Areas
title_fullStr	Influence of Molding Technology on Thermal Efficiencies and Pollutant Emissions from Household Solid Fuel Combustion during Cooking Activities in Chinese Rural Areas
title_full_unstemmed	Influence of Molding Technology on Thermal Efficiencies and Pollutant Emissions from Household Solid Fuel Combustion during Cooking Activities in Chinese Rural Areas
title_sort	influence of molding technology on thermal efficiencies and pollutant emissions from household solid fuel combustion during cooking activities in chinese rural areas
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/f5f09611e7cb420598921fd0d1f19351
work_keys_str_mv	AT juanqi influenceofmoldingtechnologyonthermalefficienciesandpollutantemissionsfromhouseholdsolidfuelcombustionduringcookingactivitiesinchineseruralareas AT jianjunwu influenceofmoldingtechnologyonthermalefficienciesandpollutantemissionsfromhouseholdsolidfuelcombustionduringcookingactivitiesinchineseruralareas AT leizhang influenceofmoldingtechnologyonthermalefficienciesandpollutantemissionsfromhouseholdsolidfuelcombustionduringcookingactivitiesinchineseruralareas
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Influence of Molding Technology on Thermal Efficiencies and Pollutant Emissions from Household Solid Fuel Combustion during Cooking Activities in Chinese Rural Areas

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